WO2006075496A1 - 石英ガラスの製造方法 - Google Patents
石英ガラスの製造方法 Download PDFInfo
- Publication number
- WO2006075496A1 WO2006075496A1 PCT/JP2005/023533 JP2005023533W WO2006075496A1 WO 2006075496 A1 WO2006075496 A1 WO 2006075496A1 JP 2005023533 W JP2005023533 W JP 2005023533W WO 2006075496 A1 WO2006075496 A1 WO 2006075496A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- starting member
- soot
- soot deposit
- outer diameter
- effective portion
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01486—Means for supporting, rotating or translating the preforms being formed, e.g. lathes
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/50—Multiple burner arrangements
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/60—Relationship between burner and deposit, e.g. position
- C03B2207/66—Relative motion
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/70—Control measures
Definitions
- the present invention relates to a method for producing quartz glass. More specifically, the present invention relates to a method for producing silica glass, in which an optical fiber preform is produced by the VAD method, whereby a high-quality optical fiber preform can be stably produced.
- the VAD method is known as a method for manufacturing an optical fiber preform.
- soot deposits are produced by depositing glass particles produced by a core deposition and a cladding deposition at the tip of a starting member attached to a rotating and rising shaft. Thereafter, the soot deposit is dehydrated and sintered to become a transparent glass, and a porous optical fiber preform having a core layer and a cladding layer is obtained.
- the first embodiment of the present invention is pulled up while rotating.
- the soot produced by flame hydrolysis of the raw material gas is deposited on the starting member, and has an approximately constant outer diameter and can be used as a glass product material.
- a method for producing a soot glass including a step of forming a soot deposit including an ineffective portion whose diameter changes, from the start of soot deposition on a starting member until the outer diameter of the soot deposit is stabilized, After the ineffective portion forming process in which the peripheral speed on the surface of the starting member is 2. OmZ or less and forming the ineffective portion, and the outer diameter of the soot deposit is stabilized, the rotation speed is suitable for forming the effective portion.
- a method for producing quartz glass including an effective part forming step of forming an effective part while rotating a starting member and a soot deposit.
- the soot deposit grows after firmly adhering to the starting member, so that it is prevented from falling off when rotation stops.
- the peripheral speed of the surface of the starting member is not more than 1.5 mZ for the predetermined time from the start of deposition.
- the “predetermined time” is the time during which the ineffective portion of the deposit is produced at the longest since the start of deposition. As a result, the soot adheres firmly to the starting member.
- a soot produced by flame hydrolysis of a raw material gas is deposited on a starting member that is pulled up while rotating to have a substantially constant outer diameter and a glass product material
- a method for producing quartz glass including a step of forming a soot deposit including an effective portion that can be formed and a non-effective portion that is formed at both ends of the effective portion and changes in outer diameter in a tapered shape. After the formation, until the rotation of the starting member and the soot deposit stops, the peripheral speed of the surface of the starting member is reduced to a predetermined final peripheral speed at a rate of 1.3 mZ per second or less.
- a method for producing quartz glass including a step of forming an effective part. As a result, the stress due to the inertia of the soot deposit itself is relieved, and the soot deposit is less likely to fall off.
- the final peripheral speed is preferably 1.5 mZ or less.
- the rotation of the soot deposit can be decelerated within a range in which the force acting on the soot deposit at the end of the deposition process does not exceed the adhesion force to the starting member.
- the soot deposit By reducing the initial rotational speed at which soot deposition is started, the soot deposit can be firmly attached to the emitting member. In addition, the force applied to the soot deposit can be reduced by reducing the change in the rotation speed of the soot deposit just before the end of the deposition. Accordingly, the soot deposit is prevented from falling off and falling.
- FIG. 1 is a diagram showing a state immediately before the start of manufacture in the manufacture of the soot deposit body 5 by the VAD method.
- FIG. 2 is a diagram showing a state after a lapse of a predetermined time that is close to the start of manufacture in the manufacture of the soot deposit body 5 by the VAD method.
- FIG. 3 is a view showing a state just before the end of production in the production of the soot deposit body 5 by the VAD method.
- FIG. 4 is a graph showing changes in the peripheral speed of the starting member 2 for a predetermined time near the start of manufacture in the manufacture of the soot deposit 5 according to Example 1.
- FIG. 5 is a graph showing changes in the peripheral speed of the starting member 2 during a predetermined time near the end of manufacture in the manufacture of the soot deposit body 5 according to Example 2.
- FIG. 1 is a diagram schematically showing the structure of a facility for producing a soot deposit by the VAD method.
- the starting member 2 to which the soot is attached is attached to the lower end of the shaft 1 that can be raised while rotating, as indicated by an arrow in the figure.
- a core deposition panner 3 for depositing soot that becomes a core portion in the optical fiber preform, and cladding deposition for generating and depositing soot that becomes a cladding portion.
- Pana 4 is placed in the vicinity of the lower end of the starting member 2.
- the core deposition burner 3 and the cladding deposition burner 4 are supplied with a source gas corresponding to the composition of the soot to be produced and contain soot. A flame is generated, and soot is deposited on the starting member 2 by irradiating the starting member 2 with the flame.
- FIG. 2 is a diagram illustrating an initial state in which the soot deposit 5 starts to be deposited on the starting member 2 in the above-described facility.
- the vicinity of the upper end of the soot deposit 5 formed first is a taper shape in which the outer diameter gradually increases from the thickness of the starting member 2, and after a certain length is formed, The outer diameter.
- the effective part with a stable outer diameter can be finally used as a material for optical fibers.
- the tapered portion near the upper end becomes an ineffective portion 51 that cannot be used as a material for the optical fiber.
- FIG. 3 is a diagram showing a state immediately before the soot deposition process is completed after the soot deposition body 5 having a desired length is formed in the above-described equipment.
- the soot deposit 5 grows, the shaft 2 and the soot deposit 5 rise, and the lower end of the soot deposit 5 where the new soot is deposited, the core depositing panner 3, and the cladding deposit.
- the relative position with Parner 4 does not change. For this reason, it is a part of the total length that the soot deposit 5 adheres to the starting member 2.
- an ineffective portion 52 whose outer diameter gradually decreases from the effective portion is also formed at the lower end of the soot deposit 5.
- the soot deposit 5 obtained by the above-described exemplary operation is dehydrated and sintered to be transparent vitrified, and becomes an optical fiber preform including a core layer and a cladding layer.
- the tapered portion formed during a predetermined time from the start of deposition and the tapered portion formed immediately before the end of deposition are both optical.
- the ineffective portions 51 and 52 may be manufactured under conditions different from the deposition conditions suitable for the soot deposit. Therefore, during the period in which the ineffective portions 51 and 52 are deposited, the rotation of the starting member 2 and the soot deposit 5 is slowed down in order to increase the adhesion of the soot deposit 5 to the starting member 2.
- the rotational speed is adjusted so that the predetermined deposition conditions are obtained.
- the adhesion of the soot deposit 5 to the starting member 2 can be improved, and the soot deposit 5 can be prevented from falling off.
- the rotational speed for a predetermined time cannot be reduced sufficiently from the start of deposition, the rotational speed is gradually decreased after the deposition is completed, so that the impact at the time of stopping is reduced. Reduced and prevented falling off due to impact.
- the peripheral speed of the surface of the starting member 2 was From the start of the production to the predetermined time, if it was kept at 1.5 mZ or less, the soot deposit 5 was seized onto the starting member 2 with sufficient strength, and it was difficult to fall.
- the peripheral speed up to the predetermined time is increased to 2 mZ min or more, the peripheral speed is gradually increased to 1.5 mZ min at a rate of 1.3 mZ min per second or more after stopping the deposition. It was difficult to fall if the rotation was stopped after decelerating to a degree or less.
- a soot deposit 5 was produced using the equipment shown in FIGS. 1 to 3.
- the equipment used in the following embodiments has a control device that changes the rotation of the starting member 2 and the soot deposit 5 attached thereto in accordance with a preset schedule. Therefore, for example, for the predetermined time, the starting speed of the starting member 2 is set to 2. OmZ minutes or less, preferably 1.5 mZ minutes or less, and the adhesion force at the contact portion between the starting member and the soot deposit is determined. Can be increased.
- the rotational speed can be increased before entering the deposition of the effective portion or at the same time to obtain a peripheral speed suitable for manufacturing the effective portion.
- the rotation speed is adjusted so that the peripheral speed of the surface of the starting member 2 is 1.3 mZ min or less per second, preferably 1. OmZ min or less per second. The rotation can be stopped when the speed is reached.
- the mass at the end of deposition of the soot deposit 5 to be deposited on the starting member 2 is increased to about 7 kg force to about 9 kg, and the number of soot deposits 5 is increased from 20 rpm to 40 rpm.
- the starting member 2 used had an outer diameter of 20 mm ⁇ and a length of 400 mm, and the peripheral speed of the surface of the starting member 2 during production and when stopped was 2.5 mZ. As a result, the three soot deposits 5 dropped out of the starting member 2 when the rotation stopped after the soot deposition.
- each of the pars 34 is supplied with a source gas under the following conditions.
- Lower Pana 4 0 Zl5slm, H / 16slm, N / 2.5slm, SiCl / 1.4slm,
- a soot deposit body having an outer diameter of 20 mm ⁇ and a length of 400 mm is used, and each burner 3 and 4 has the same conditions as the above comparative example, and the mass at the end of deposition is about 9 kg.
- the rotation speed is 20 rpm (the peripheral speed of the surface of the starting member 2 is 1.3 mZ) for 3 hours while the deposition starting force ineffective portion is deposited, and then the rotation speed is 40 rpm.
- the effective part was manufactured up to the end, and after a predetermined amount of deposition was completed, the rotation was stopped instantaneously.
- a starting member with an outer diameter of 20 mm ⁇ and a length of 400 mm is used, and each soot 3 and 4 is manufactured under the same conditions as the above comparative example, producing a soot deposit with a mass at the end of deposition of about 9 kg. did.
- the rotation speed was maintained at 40 rpm (the peripheral speed of the surface of starting member 2 was 2.5 mZ).
- the peripheral speed was gradually decreased to a final peripheral speed of 1.3 mZ (20 rpm in rotation speed) at a rate of lmZ per second, and then the rotation was instantaneously performed. Stopped force Even if 30 pieces were produced, no matter what dropped, there was enough force.
- the rotation is reduced for a while at the start of deposition at the low-speed rotation and at the end of the deposition.
- the rotational speed at the start of deposition can be made closer to the steady state.
- the rotation speed at the end of the stack can be made closer to the rotation speed at the steady state.
- the rotational speed at the start of deposition is 30 rpm (the peripheral speed on the surface of the starting member 2 is 1.9 mZ), and the steady rotational speed is 40 rpm (the peripheral speed on the surface of the starting member 2 is 2. 5m
- a soot deposit was produced as Z). At the end of deposition, the final number of revolutions
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
- Glass Melting And Manufacturing (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2005800490921A CN101142144B (zh) | 2005-01-17 | 2005-12-21 | 石英玻璃的制造方法 |
US11/826,440 US20070271962A1 (en) | 2005-01-17 | 2007-07-16 | Production method of quartz glass |
US14/259,833 US20140230494A1 (en) | 2005-01-17 | 2014-04-23 | Production Method of Quartz Glass |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-009251 | 2005-01-17 | ||
JP2005009251A JP4520863B2 (ja) | 2005-01-17 | 2005-01-17 | 石英ガラスの製造方法 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/826,440 Continuation US20070271962A1 (en) | 2005-01-17 | 2007-07-16 | Production method of quartz glass |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006075496A1 true WO2006075496A1 (ja) | 2006-07-20 |
Family
ID=36677526
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/023533 WO2006075496A1 (ja) | 2005-01-17 | 2005-12-21 | 石英ガラスの製造方法 |
Country Status (6)
Country | Link |
---|---|
US (2) | US20070271962A1 (ja) |
JP (1) | JP4520863B2 (ja) |
KR (1) | KR101214740B1 (ja) |
CN (1) | CN101142144B (ja) |
TW (1) | TW200626514A (ja) |
WO (1) | WO2006075496A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6006186B2 (ja) * | 2012-09-28 | 2016-10-12 | 信越化学工業株式会社 | 光ファイバ用多孔質ガラス堆積体の製造方法 |
JP2014201513A (ja) * | 2013-04-10 | 2014-10-27 | 信越化学工業株式会社 | 焼結装置 |
JP6441152B2 (ja) * | 2015-04-06 | 2018-12-19 | 信越化学工業株式会社 | 多孔質ガラス母材の製造方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0725638A (ja) * | 1993-07-09 | 1995-01-27 | Fujikura Ltd | 光ファイバ母材支持軸の回転制御方法および装置 |
JPH0733468A (ja) * | 1993-07-21 | 1995-02-03 | Furukawa Electric Co Ltd:The | 光ファイバスートの製造方法 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4465708A (en) * | 1983-05-31 | 1984-08-14 | At&T Technologies, Inc. | Technique for fabricating single mode lightguide soot-forms |
JPH02307837A (ja) * | 1989-05-18 | 1990-12-21 | Fujikura Ltd | 光ファイバ母材の製造方法 |
JP3334219B2 (ja) * | 1993-02-19 | 2002-10-15 | 住友電気工業株式会社 | ガラス母材の製造装置および製造方法 |
US5281248A (en) * | 1993-02-22 | 1994-01-25 | Litespec, Inc. | VAd process improvements |
JP3524426B2 (ja) * | 1999-04-02 | 2004-05-10 | 古河電気工業株式会社 | 多孔質光ファイバ母材の製造装置 |
EP1106584B1 (en) * | 1999-12-01 | 2007-11-14 | Shin-Etsu Chemical Co., Ltd. | Method and apparatus for manufacturing a preform for an optical fibre |
US8516855B2 (en) * | 2001-04-27 | 2013-08-27 | Prysmian Cavi E Sistemi Energia S.R.L. | Method for producing an optical fiber preform |
KR100508707B1 (ko) * | 2002-08-12 | 2005-08-17 | 엘에스전선 주식회사 | 외부 기상증착에 의한 프리폼 제조방법 및 제조장치 |
CN1618750B (zh) * | 2003-11-11 | 2010-04-28 | 株式会社藤仓 | 多孔二氧化硅预制件的制造方法和多孔二氧化硅预制件 |
-
2005
- 2005-01-17 JP JP2005009251A patent/JP4520863B2/ja active Active
- 2005-12-21 CN CN2005800490921A patent/CN101142144B/zh active Active
- 2005-12-21 WO PCT/JP2005/023533 patent/WO2006075496A1/ja not_active Application Discontinuation
- 2005-12-21 KR KR1020077018310A patent/KR101214740B1/ko active IP Right Grant
-
2006
- 2006-01-02 TW TW095100034A patent/TW200626514A/zh unknown
-
2007
- 2007-07-16 US US11/826,440 patent/US20070271962A1/en not_active Abandoned
-
2014
- 2014-04-23 US US14/259,833 patent/US20140230494A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0725638A (ja) * | 1993-07-09 | 1995-01-27 | Fujikura Ltd | 光ファイバ母材支持軸の回転制御方法および装置 |
JPH0733468A (ja) * | 1993-07-21 | 1995-02-03 | Furukawa Electric Co Ltd:The | 光ファイバスートの製造方法 |
Also Published As
Publication number | Publication date |
---|---|
CN101142144A (zh) | 2008-03-12 |
KR101214740B1 (ko) | 2012-12-21 |
US20140230494A1 (en) | 2014-08-21 |
JP2006193394A (ja) | 2006-07-27 |
CN101142144B (zh) | 2012-09-26 |
KR20070092761A (ko) | 2007-09-13 |
JP4520863B2 (ja) | 2010-08-11 |
US20070271962A1 (en) | 2007-11-29 |
TW200626514A (en) | 2006-08-01 |
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